package com.xu.blog_after_end.web.admin;

import com.xu.blog_after_end.po.Type;
import com.xu.blog_after_end.service.TypeService;
import jakarta.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

@Controller
@RequestMapping("/admin")
public class TypeController {
    @Autowired
    private TypeService typeService;
    @GetMapping("/types")
    public String types(@PageableDefault(size = 6, sort = {"id"}, direction = Sort.Direction.DESC)    //设置默认的分页参数，size = 10 表示每页显示 10 条记录，sort = {"id"} 表示按 id 字段排序,direction = Sort.Direction.DESC倒序
                            Pageable pageable, Model model){
        model.addAttribute("page", typeService.listType(pageable));
        return "admin/types";
    }
    @GetMapping("/types/input")
    public String input(Model model){
        model.addAttribute("type", new Type());
        return "admin/types-input";
    }
    @GetMapping("/types/{id}/input")
    public String editInput(@PathVariable Long id, Model model){
        model.addAttribute("type", typeService.getType(id));  // 根据 id 查询分类
        return "admin/types-input";
    }

    @PostMapping("/types")
    public String post(@Valid Type type, BindingResult result, RedirectAttributes attributes){  // @Valid 表示校验 type 对象 是否合法
        Type type1 = typeService.getTypeByName(type.getName());
        if (type1!= null){
            result.rejectValue("name", "nameError", "分类已存在");
        }
        if (result.hasErrors()){
            return "admin/types-input";
        }
        Type t = typeService.saveType(type);
        if (t == null){
            attributes.addFlashAttribute("message", "新增分类失败");      //没有保存成功 返回错误信息
        }else {
            attributes.addFlashAttribute("message", "新增分类成功");      //保存成功
        }
        return "redirect:/admin/types";
    }
    @PostMapping("/types/{id}")
    public String editPost(@Valid Type type, BindingResult result, @PathVariable Long id, RedirectAttributes attributes){
        Type type1 = typeService.getTypeByName(type.getName());
        if (type1!= null){
            result.rejectValue("name", "nameError", "分类已存在");
        }
        if (result.hasErrors()){
            return "admin/types-input";
        }
        Type t = typeService.updateType(id, type);
        if (t == null){
            attributes.addFlashAttribute("message", "更新分类失败");      //没有保存成功 返回错误信息
        }else {
            attributes.addFlashAttribute("message", "更新分类成功");      //保存成功
        }
        return "redirect:/admin/types";
    }
    @GetMapping("/types/{id}/delete")
    public String delete(@PathVariable Long id, RedirectAttributes attributes){
        typeService.deleteType(id);
        attributes.addFlashAttribute("message", "删除成功");
        return "redirect:/admin/types";
    }
}
